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Hot air circulation system for tobacco drying

A technology of circulation system and heat pump system, which is applied in tobacco drying, drying gas arrangement, local agitation dryer, etc., can solve the problems of large energy consumption, achieve high energy efficiency, reduce operating costs, and reduce loads

Pending Publication Date: 2020-05-19
QINHUANGDAO TOBACCO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to complete the drying process tasks of tobacco such as shredded leaves, shredded stems and rebaked leaves, the hot air system of these dryers uses air at a higher temperature to dry them, which consumes a lot of energy

Method used

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  • Hot air circulation system for tobacco drying
  • Hot air circulation system for tobacco drying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a tobacco drying hot air circulation system 10 is introduced in this embodiment, comprising a drying chamber 1, a circulating air duct 4 and a heat pump system 3, the drying chamber 1 is provided with an air inlet 11 and an air outlet 12, and the circulating air duct 4 is provided with Outside the drying chamber 1, both ends are respectively connected with the air inlet 11 and the air outlet 12 of the drying chamber 1 to form a circulating air path with the drying chamber 1. At least part of the heat pump system 3 is arranged in the circulating air duct 4, and the circulating air duct After the airflow in 4 dries the materials in the drying chamber 1, the part of the heat pump system 3 in the circulating air duct 4 is dehumidified and heated to become a medium-temperature dry airflow, and then flows back into the drying chamber 1 for the next drying cycle . The degradation reaction of effective ingredients, nutritional ingredients and bioacti...

Embodiment 2

[0040] Such as figure 1As shown, in this embodiment, the heat pump system 3 further includes a compressor 33 and a throttle valve 35, the evaporator 31, the compressor 33, the condenser 34 and the throttle valve 35 are connected in sequence, and one end of the compressor 33 is connected to the The evaporator 31 is connected, and the other end is connected with the condenser 34; one end of the throttle valve 35 is connected with the evaporator 31, and the other end is connected with the condenser 35. The machine 33, the condenser 34, and the throttle valve 35 circulate in the evaporator 31 to form a heat pump cycle.

[0041] In this embodiment, the low-pressure and low-temperature liquid working medium in the heat pump system 3 flows into the evaporator 31, and absorbs the heat of the low-temperature and humid airflow in the evaporator 31, so that the low-temperature and humid airflow is further cooled below the dew point temperature. The low-pressure liquid working medium is ...

Embodiment 3

[0043] Such as figure 1 As shown, in this embodiment, a fan 5 is also provided in the circulating air duct 4 , and the fan 5 is used to control the flow direction of the airflow in the circulating air duct 4 .

[0044] In this embodiment, the fan 5 is arranged downstream of the evaporator 31 and upstream of the condenser 34 to control the flow of air in the circulating air duct 4 from the evaporator 31 to the direction of the condenser 34 .

[0045] In this embodiment, a dust remover 2 is also provided in the circulating air duct 4, and the dust remover 2 is arranged at the upstream of the evaporator 31 and at the air outlet 12 of the drying chamber 1, so as to prevent the air that flows out of the drying chamber 1 and is about to enter the evaporation process. The airflow of the device 31 is subjected to dust removal treatment.

[0046] In this embodiment, the dust remover 2 is also provided with a dust discharge port 21 , and the dust discharge port 21 is provided through t...

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Abstract

The invention discloses a hot air circulation system for tobacco drying. The system comprises a drying chamber, a circulating air duct and a heat pump system, wherein the drying chamber is provided with an air inlet and an air outlet; the circulating air duct is arranged outside the drying chamber, and two ends of the circulating air duct are connected with the air inlet and the air outlet of thedrying chamber correspondingly to form a circulating air path with the drying chamber; at least part of the heat pump system is arranged in the circulating air duct; and after materials in the dryingchamber are dried through airflow in the circulating air duct, the airflow become medium-temperature drying airflow after being dehumidified and heated through the part, located in the circulating airduct, of the heat pump system and then flows back into the drying chamber. By means of the arrangement, medium-temperature drying of the materials can be achieved, the drying quality of the materialsis guaranteed, and the system is of great significance in the speed-reducing drying stage with long drying time and relatively small drying load. Besides, a closed circulation mode of dry airflow isadopted, so that the load of air purification equipment is reduced, and the fragrance loss of the materials in the drying process is reduced.

Description

technical field [0001] The invention belongs to the technical field of tobacco processing, and in particular relates to a tobacco drying hot air circulation system. Background technique [0002] Tobacco drying is an indispensable processing step in the tobacco production process. At present, the drying methods commonly used in the tobacco industry are mainly to dry tobacco such as shredded leaves, shredded stems and rebaked leaves by using dryers such as drum type, fluidized bed type, and air flow type. deal with. In order to complete the drying process tasks of tobacco such as shredded leaves, shredded stems and rebaked leaves, the hot air system of these dryers uses air at a higher temperature to dry them, which consumes a lot of energy. At the same time, it is particularly important that tobacco is a heat-sensitive substance, and high temperature will destroy the taste of tobacco. Only by drying it at low temperature can the color, aroma, taste and texture of tobacco be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B9/06F26B21/04F26B21/08
CPCF26B9/06F26B21/001F26B21/003F26B21/04F26B21/08F26B2200/22
Inventor 郭冬青张金生周玉生胡尚礼侯继超李书杰刘德旭蒙海涛陈大伟张禹孔令禄谷金凤张奕汤玉琢赵汉章
Owner QINHUANGDAO TOBACCO MACHINERY
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